What is Rust?

Learn that Rust is a safe, fast and concurrent systems language.

What is Rust?

Rust is a compiled systems programming language that aims to be as fast as C/C++ while being safe against memory bugs. It has no garbage collector; memory is managed at compile time through ownership rules.

fn main() {
    let mesaj = "Merhaba Rust";
    println!("{}", mesaj);
}

Parts of Firefox, Linux kernel drivers, and the infrastructure of Discord and Cloudflare are written in Rust.

Why Rust?

Rust makes three promises: safety (null pointers, data races and use-after-free bugs are caught at compile time), speed (zero-cost abstractions, no runtime overhead) and concurrency (the compiler rejects unsafe access to shared data). The cost: the compiler is strict and the learning curve is steeper than other languages.

Exercise First line

Inside main, declare let dil = "Rust"; and print it with println!("{} öğreniyorum", dil);.

Show example solution

fn main() {
    let dil = "Rust";
    println!("{} öğreniyorum", dil);
}

Test yourself

How does Rust manage memory?
- Through an interpreter
- With ownership rules, at compile time
- With a garbage collector
- The programmer frees every allocation by hand
Show answer

With ownership rules, at compile time — The compiler tracks that every value has one owner and frees memory automatically when the owner goes out of scope.

Entry point

____ main() {
    println!("Merhaba");
}

Show answer

fn main() {
    println!("Merhaba");
}

Promise and meaning

Safety

Memory bugs are caught at compile time
Speed

No runtime overhead
Concurrency

Data races are rejected
Sahiplik

Instead of a garbage collector

Next lesson: Project with Cargo

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